The former astronaut and husband of Gabby Giffords presents a huge challenge for the Republicans in Arizona, if he can secure the nomination.

Source: Washington Post

Mark Kelly, a former astronaut and husband of former congresswoman Gabrielle Giffords, announced Tuesday that he is moving forward with a U.S. Senate bid, a move that could create a marquee race next year in Arizona.

Kelly, a Democrat, is challenging Sen. Martha McSally (R-Ariz.), who was appointed late last year by Arizona Gov. Doug Ducey (R) to the seat long held by former senator John McCain (R-Ariz.), who died last year after a battle with brain cancer.

Kelly, 54, who has been heavily recruited by Democrats, announced his intentions with a video in which he calls the campaign “my next mission.”